| 501 | General guide to the prevention of water pollution |
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| 502 | Guidance for the Development of Housing on Land Affected by Contamination |
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| 503 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
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| 504 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
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| 505 | Life cycle assessment of disposable and reusable nappies in the UK |
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| 506 | Managing the social aspects of flooding: Synthesis Report |
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| 507 | Model For Investigating The Impacts Of Groundwater Abstraction |
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| 508 | National guidelines for the production of NRA regions 1990/91 regional plans |
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| 509 | Operational mechanisms for the protection and enhancement of headwaters |
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| 510 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
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| 511 | Survey of copper speciation in the Great Ouse estuary |
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| 512 | Technical Support Materials for the Regulation of Radioactively Contaminated Land |
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| 513 | The impact of climate change on severe droughts: Implications for decision making |
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| 514 | The Impact of Grazing and Upland Management on Erosion and Runoff |
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| 515 | The Potential For Generating Hydro-Electricity From Weirs |
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| 516 | The Potential For Aquifer Storage And Recovery In England And Wales |
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| 517 | The feasibility of biomanipulation in reservoirs and deeper lakes : draft final report |
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| 518 | The development and verification of methodologies for defining groundwater nitrate vulnerable zones |
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| 519 | The Feasibility of Charging for Planning Application Consultations - Final Report |
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| 520 | The use of herbicides in or near water |
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| 521 | Status of rare fish : literature review of Freshwater Fish in the UK |
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| 522 | Distribution of Azolla in the Great Ouse catchment |
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| 523 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 524 | Leachate Monitoring For The Brogborough Test Cell Project |
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| 525 | Time of travel on the [River] Chertsey Bourne under low flow conditions |
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